Improvement in steam vacuum-pumps



UNITED STATES PATENT OFFICE.

WILLIAM BURDON, OF BROOKLYN, NEWYDRK.

IMPROVEMENT |N STEAM vAcuuM-PuMPs'.

Specification forming part of Letters Patent No. 139,235, dated May 27,1873; application filed August 9, 1872.

To all whom it may concern:

Be it known that I, WILLIAM BURDON, of Brooklyn, in the county -of Kingsand State of New York, have invented new and useful Improvements inApparatus for Raising and Forcing Water; and I hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing forming part of thisspecification.

This invention relates to that class of apparatus in which a vacuum isformed alternately in two adjacent chambers or cylinders, and

water raised into it by atmospheric pressure' and afterward expelled bya piston operated by the pressure of steam, which is subsequentlycondensed to form a vacuum for the repetition of the operation.

The improvement consists in the combination with the two Water cylindersor chambers, and with the pistons workin g therein, of valves soconstructed, organized, and operated,that the steam is first admitted toeach cylinder or chamber, above its piston, for the purpose ofdepressing the piston and expelling the water from below it, andafterward allowed to exhaust in to the same cylinder below the piston,

attached perforated cups, arranged some distance below them, wherebyalso water is retained in the discharge of the chambers, and in theascent of the pistons escapes and continues iowing after the ilow fromthe cups before mentioned has ceased, and thereby perfects thecondensation of the steam.

The accompanying drawing represents a central vertical section of anapparatus constructed according to my invention.

AA are two water-chambers or cylinders,

which are furnished with hollow pistons B B,` and are arranged at somedistance apart, on

a box partitioned centrally, to form two com-V partments C C, each ofwhichcommunica tes f p l with a suctionpipe, D, through a valve, E.

The cylinders ,are open at the bottom, and consequently there is freecommunication between .y l

them and their respective compartments C C.

These compartments are provided with salient` grated openings a a,furnished with flap-valves b b. These openings communicate `with an\open-topped trough, F,`which surrounds the compartments G10 anddischarges through lips c c. The chambers or cylinders A A have formedon their adjacent sides steam-chests G G, which communicate throughports d d with the extreme upper and lower portions of y Thesesteam-chests arefursaid cylinders. nishedwith slide-valves H H, whichcontrol the admission of steanIto the cylinders," and are operated'byeccentrics I I set reversely on a shaft, J, which is supported on rodsor stand ards e c secured onA the tops of the cylinders.

rEhe rods of the pistons B B are secured to cross-heads -K K, whichslide up and down on the rods e e, and thereby constitute the latter Tothese cross I heads are 'pivoted 'rods L L that connect the former with.cranks M M set reversely on the I guides as wellas supports.

aforesaid shaft J. A ily-wheel, P, is provided on the shaft justreferred to. hollow pistons B B there is an `annular perfo` ratedopen-topped receptacle, N, and secured,

at some distance below each piston, to a rod extending therefrom, is anopen-topped perforated cup, O.

The apparatus operates as follows: The 1 chambers A A are iirst Jiilledwith water by` any convenient means. `The shaft J is then turned to openone of the steam-valves H H,

which, for convenience, I will suppose to be the left. Steam is admittedto the steam-chest within which this valve works, and thence enters theleft cylinder A, and acting on the top of the piston B therein, causes`it to descend and expel the water? in the chamber through the valves bb. Duringv the discharge ofthe chamber, the receptacle N and cup O Jill,and

when the piston hascompleted its stroke, and the water, by its impetusand Weight, has re.-4 ceded below it and the cup O, both the latter Ineach ofthe andy the receptacle N dscharge in a spray or shower throughthe perforations. By the time the piston stroke is completed, theslide-valve of its cylinder A is shiftedby Yits eccentric to shut offthe supply of steam and establish through the suction-pipe byatmospheric press.. ure. At the same time that the left slide-g valvewas shifted to shut off the supply of steam from its cylinder, the rights1ideValVe was, by its eccentric, shifted to admit steam to itscylinder. Acting on the piston, this steam causes it to descend, andthis, through the medium of the shaft J, causes the left piston toascend. The continued discharge of the water 'receptacles attached tothis latter piston, perfects the condensation ofthe steam below thepiston, and the water follows it up and fills the cylinder. By thedescent of the right piston, the water is, of course, expelled from theright-cylinder through the openings a a in its compartment C. By thetime the stroke of the right-cylinder piston is conipleted, theslide-Valve belonging to said cylinder is shifted, and steam is admittedbelow the piston from above it. Spray from the water-receptaclesattached to the piston condenses the steam, and, forming a vacuum,

causes water to flow in from the suction-pipe D. Simultaneously with theshifting of the right slide-valve to shut off the supply of steamfromitscylinder, the left valve was shifted to admit steam to the left.By the action of the steam on the left piston,A the latter descends andeXpels the water below it, and by means of the shaft J raises the rightpiston, and so permits the right chamber to fill. Thus the operationcontinues, each chamber filling while the other is discharging, and ViceVersa.

Y Claim. l.. The combination with the two water-cylinders or chambersand their connected pistons constructed and arranged to admit of valvessteam to each cylinder or chamber above its piston, and afterward toexhaust such steam into the same cylinder or chamber below its piston,substantially as and for the purpose herein set forth.

2. 'In combination with hollow pistons, the perforated water-receptaclesconstructed for operatiom. substantially as and for the purposespecified.

3. The combination, with the cylinder and hollow pistons, of perforatedcups arranged below the pistons, substantially as and for the purposeherein described;

` WM. BURDON.'

' Witnesses:

MICHAEL RYAN, FRED. HAYNEs.

